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प्रश्न
“First meiotic division is the reduction division” what does the word ‘reduction’ refer to in this statement?
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उत्तर
In this statement, reduction means that the number of chromosomes are reduced to half i.e. out of the 23 pairs of chromosomes in humans, only single set of chromosomes are passed on to the sex cells.
संबंधित प्रश्न
State the difference between:
Chromosome and chromatid:
Choose the correct answer:
Minimum coiling in chromosome is at ______________
Choose the correct answer:
Centromere is related to _______________
Choose the correct answer:
During mitosis which of the following disintegrate ___________
Mention the contribution of the scientist given below in the study of chromosome:
Waldeyer
Write a sentence of the following:
Centromere
Write a sentence of the following:
Telomere
Choose the correct answer:
Thick short chromosomes can be observed at (in mitosis) ___________
(i) Draw a neat labeled diagram to show the metaphase stage of mitosis in an animal cell having ‘6’ chromosome.
(ii) How many daughter cells are formed at the end of mitosis and at the end of meiosis?
(iii) With reference to cell division explain the following terms:
(Chromatid, Centromere, Haploid).
(iv) Name the type of cell division that occurs during:
1. Growth of shoot 2. Formation of pollen grains.
3. Repair of worn out tissues.
Name the following:
The part of the cell associated with heredity.
State the Location: Chromosomes
Give Reason:
The Law of independent assortment holds good for the gene pairs that occur in different pairs of chromosomes.
Name the following:
Cells having a single set of chromosomes.
Complete the following sentence with appropriate word:
The chromosomal theory of inheritance was proposed by ____________in 1902.
What is allosome?
Identify the odd one:-
In humans, the sex chromosome complement is
Given below is a set of four term. Choose the odd one and write the category of the remaining term:
